UC3177QPTR [ETC]
Servo Motor Controller/Driver ; 伺服电机控制器/驱动器\n
| 型号： | UC3177QPTR |
| 厂家： | 
ETC |
| 描述： | Servo Motor Controller/Driver
|
| 文件： | 总5页 (文件大小：412K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC3176
UC3177
Full Bridge Power Amplifier
FEATURES
DESCRIPTION
•
•
•
•
•
Dual Power Operational Amplifiers
The UC3176/7 family of full bridge power amplifiers is rated for a continu-
ous output current of 2A. Intended for use in demanding servo applications
such as disk head positioning, the onboard current sense amplifier can be
used to obtain precision control of load current, or where voltage mode
drive is required, a standard voltage feedback scheme can be used. Out-
put stage protection includes foldback current limiting and thermal shut-
down, resulting in a very rugged device.
±2A Output Current Guaranteed
Precision Current Sense Amplifier
Two Supply Monitoring Inputs
Parking Function and Under-Voltage
Lockout
Auxiliary functions on this device include a dual input under-voltage com-
parator that can be programmed to respond to low voltage conditions on
two independent supplies. In response to an under-voltage condition the
power Op-Amps are inhibited and a high current, 100mA, open collector
drive output is activated. A separate Park/Inhibit command input.
•
•
Safe Operating Area Protection
3V to 35V Operation
The devices are operational over a 3V to 35V supply range. Internal un-
der-voltage lockout provides predictable power-up and power-down char-
acteristics.
BLOCK DIAGRAM
10/94
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UC3176
UC3177
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply voltage, (+VIN). . . . . . . . . . . . . . . . . . . . . . . 40V
Park/Inhibit, UV1 and UV2 inputs (zener clamped)
Maximum forced voltage . . . . . . . . . . . . . . . . -0.3V to 10V
Maximum forced current. . . . . . . . . . . . . . . . . . . . . ±10mA
Other Input Voltages. . . . . . . . . . . . . . . . . . . . . -0.3V to +VIN
AlSINK and BlSINK Voltages. . . . . . . . . . . . . . . . . . -0.3V to 6V
Open Collector Output Voltages. . . . . . . . . . . . . . . . . . . . 40V
A and B Output Currents (Continuous)
Source . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5A
Total Supply Current (Continuous). . . . . . . . . . . . . . . . . . . 4A
Parking Drive Output Current (Continuous). . . . . . . . 200mA
Supply OK Output Current, UC3177 (Continuous) . . . 30mA
Operating Junction Temperature . . . . . . . . -55°C to +150°C
Power Dissipation at TC = +75°C
CONNECTION DIAGRAM
PACKAGE PIN FUNCTION
PLCC-28 (Top View)
QP Package
FUNCTION
PIN
1
+VIN
B Output
BISINK(Sense)
BISINK
2
3
4
N/C
B- Input
5-7
8
*
9
Park/Inhibit
Parking Drive
Gnd (Heat Flow Pins)
UV1
10
11
12-18
19
20
21
22
23
24
25
26
27
28
UV2
Current Feedback
A+ Input
A- Input
N/C
AISINK
AISINK(Sense)
A Output
Gnd
QP package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4W
Storage Temperature . . . . . . . . . . . . . . . . . -65°C to +150°C
Note 1: Unless otherwise indicated, voltages are reference to
ground and currents are positive into, negative out of, the
specified terminals.
THERMAL DATA
QP package:
Thermal Resistance Junction to Leads, θJL . . . . . . 15°C/W
Thermal Resistance Junction to Ambient, θJA . . . . 50°C/W
*Pin 9: UC3176, B+ Input
UC3177, Supply OK
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, specifications hold for TA = 0 to 70°C, +VIN = 12V, TA = TJ
.
PARAMETER
Input Supply
TEST CONDITIONS
MIN. TYP. MAX. UNITS
18
21
25
30
mA
mA
V
Supply Current
+VIN = 12V
+VIN = 35V
2.8
220
3.0
300
UVOL Threshold
+VIN low to high
mV
Threshold Hysteresis
Power, Amplifier, A and B
Input Offset Voltage
Input Bias Current
8
mV
nA
VCM = 6V, VOUT = 6V
-500
23
-100
28
VCM = 6V, Except A+ Input
35
µA/V
nA
Input Bias Current at A+/Reference Input (A+/Ref - BISINK)/36kohms; TJ = 25°C
Input Offset Current B Amp (UC3176 Only) VCM = 6V
200
70
70
100
100
4
dB
CMRR
VCM = 1 to 33V, +VIN =35V, VOUT = 6V
+VIN = 5 to 35V, VCM = 2.5V
dB
PSRR
1.5
V/mV
µV/W
V
Large Signal Voltage Gain
Thermal Feedback
Saturation Voltage
VOUT = 3V, w/IOUT = 1A to VOUT = 9V, w/IOUT = -1A
+VIN = 20V, Pd = 20W at opposite output
IOUT = -2A, High Side, TJ = 25°
25
1.9
1.6
3.5
1
200
3.7
V
CIOUT = 2A, Low Side, TJ = 25°C
Total VSAT at 2A, TJ = 25°C
V
MHz
V/µs
Unity Gain Bandwidth
Slew Rate
1
Differential IOUT Sense Error Current
in Bridge Configuration
IOUT(A) = -IOUT(B), /IOUT/- /AISINK - BISINK/
IOUT ≤200mA
3.0
5.0
-2.7
6.0
10
mA
mA
A
IOUT ≤ 2A
-2.0
High Side Current Limiting
=VIN - VOUT < 12V
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UC3176
UC3177
Unless otherwise stated, specifications hold for TA = 0 to 70°C, +VIN = 12V, TA = TJ
.
ELECTRICAL CHARACTERISTICS:
PARAMETER
Current Sense Amplifier
Input Offset Voltage
TEST CONDITIONS
MIN. TYP. MAX. UNITS
3
mV
VCM = 0V, A+/Ref at 6V
Ref = 2V to 20V, +VIN = 35, change with Ref
input voltage
600
75
µV/V
Thermal Gradient Sensitivity
+VIN = 20V, Ref = 10V Pd = 20W @ A or B
output
5.0
100
8
µV/W
dB
70
PSRR
Ref = 2.5V, +VIN = 5 to 35V
/AISINK - BISINK/ ≤ 0.5V
7.8
8.1
V/V
V/µS
MHz
mA
V
Gain
2
Slew Rate
1
3dB Bandwidth
Max Output Current
Output Saturation Voltage
2.5
3.5
0.15
1.4
ISOURCE = +VIN - VOUT = 0.5V
ISOURCE = 1.5mA, High Side
ISINK = 5mA, Low Side
0.30
1.7
V
Under-Voltage Comparator
1.44
50
1.50
70
1.56
80
V
mV
µA
V
Threshold Voltage
Low to High, other input at 5V
Threshold Hysteresis
Input = 2V, other input at 5V
IOUT = 5mA
-2
-.05
Input Current
0.45
5
Supply OK VSAT (UC3177 Only)
Supply OK Leakage (UC3177 Only)
Park/Inhibit
µA
VOUT = 35V
1.1
1.3
60
1.7
100
0.7
15
V
µA
V
Park/Inhibit Thl’d
Park/Inhibit Input Current
Parking Drive Saturation Voltage
Parking Drive Leakage
Thermal Shutdown
At threshold
IOUT = 100mA
VOUT = 35V
0.3
µA
165
°C
Shutdown Temperature
Output Saturation Voltage
vs Current
Maximum Source Current
vs +VIN - VOUT
Crossover Current Error
Characteristic
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UC3176
UC3177
APPLICATION AND OPERATION INFORMATION
WAVEFORMS FOR ABOVE APPLICATION
DESIGN EQUATIONS
IL
RF2
1
8RS
Transconductance (GO) =
=
×
VS RF1
with: RSA = RSB and RF3 = RF4
VIN − 1.5
Parking Current (IP) =
RP + RL
where: RL = load resistance
Under-Voltage Thresholds, at Supplies
High to Low Threshold, (VLH) = 1.425 (RA + RB)/RB
Low to High Threshold, (VHL) = 1.5 (RA + RB)/RB
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3460
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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